Digital Subscriber Line or DSL - refers to the broadband access technology that uses existing copper infrastructure to deliver data, voice and video simultaneously. DSL can deliver high-speed data, voice and integrated services over traditional twisted-pair copper wire that is already available in many business and residential locations. Aside from increasing the speed, DSL offers the flexibility and reach required for businesses to extend on-line resources and applications to remote sites for teleworking. SDSL (Symmetric DSL) - this is a type of DSL access where the downstream speed is the same as the upstream speed. This type of access does not support voice connections on the same line. This symmetry is particularly beneficial to businesses that would like to be able to send as fast as they can receive. Some of the commom applications are: * Internet Browsing * File downloads from the Internet * Sending and receiving of emails * Multimedia Web Hosting (voice, video) ADSL (Asymetric DSL) - ADSL delivers high-speed data and voice service over the same line. The key to ADSL is that the upstream and downstream bandwidth is asymetric, or uneven. In practice, the bandwith from the provider to the user (downstream) will be the higher speed path. IDSL (ISDN DSL) - This type of access is a hybrid of ISDN and DSL. It is an always-on alternative to dial-up IDSN. Similar to IDSL, it does not support voice connections on the same line.